Optical scanner



FIG. 1 is a top, left side perspective view of the claimed design, on a reduced scale; the broken line drawing of a human hand is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for optical scanner, as shown and described. 